Add CloseableControlImpl, useable with JdbcMapper classes/interfaces
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package org.apache.beehive.controls.system.jdbc;
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import org.apache.beehive.controls.api.bean.ControlInterface;
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import java.io.Closeable;
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@ControlInterface
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public interface CloseableControl extends Closeable {
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}
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* $Header:$
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*/
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package org.apache.beehive.controls.system.jdbc;
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import com.moparisthebest.jdbc.codegen.JdbcMapperFactory;
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import org.apache.beehive.controls.api.ControlException;
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import org.apache.beehive.controls.api.bean.ControlImplementation;
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import org.apache.beehive.controls.api.bean.Extensible;
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import org.apache.beehive.controls.api.context.ControlBeanContext;
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import org.apache.beehive.controls.api.context.ResourceContext;
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import org.apache.beehive.controls.api.context.ResourceContext.ResourceEvents;
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import org.apache.beehive.controls.api.events.EventHandler;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import java.io.Closeable;
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import java.lang.reflect.Method;
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import static com.moparisthebest.jdbc.TryClose.tryClose;
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/**
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* The implementation class for the database controller.
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*/
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@ControlImplementation
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public class CloseableControlImpl implements CloseableControl, Extensible, java.io.Serializable {
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//
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// contexts provided by the beehive controls runtime
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//
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@org.apache.beehive.controls.api.context.Context
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protected ControlBeanContext _context;
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@org.apache.beehive.controls.api.context.Context
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protected ResourceContext _resourceContext;
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protected transient Closeable closeable;
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private static final Log LOGGER = LogFactory.getLog(CloseableControlImpl.class);
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/**
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* Constructor
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*/
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public CloseableControlImpl() { }
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/**
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* Invoked by the controls runtime when a new instance of this class is aquired by the runtime
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*/
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@EventHandler(field = "_resourceContext", eventSet = ResourceEvents.class, eventName = "onAcquire")
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public void onAquire() {
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if (LOGGER.isDebugEnabled()) {
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LOGGER.debug("Enter: onAquire()");
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}
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try {
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@SuppressWarnings("unchecked")
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final Closeable closeable = (Closeable) JdbcMapperFactory.create(_context.getControlInterface());
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this.closeable = closeable;
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} catch (Exception se) {
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throw new ControlException("Exception while attempting to instantiate implementation.", se);
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}
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}
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/**
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* Invoked by the controls runtime when an instance of this class is released by the runtime
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*/
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@EventHandler(field = "_resourceContext", eventSet = ResourceEvents.class, eventName = "onRelease")
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public void close() {
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if (LOGGER.isDebugEnabled()) {
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LOGGER.debug("Enter: onRelease()");
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}
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tryClose(closeable);
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closeable = null;
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}
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/**
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* Called by the Controls runtime to handle calls to methods of an extensible control.
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*
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* @param method The extended operation that was called.
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* @param args Parameters of the operation.
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* @return The value that should be returned by the operation.
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* @throws Throwable any exception declared on the extended operation may be
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* thrown. If a checked exception is thrown from the implementation that is not declared
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* on the original interface, it will be wrapped in a ControlException.
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*/
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public Object invoke(Method method, Object[] args) throws Throwable {
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if (LOGGER.isDebugEnabled()) {
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LOGGER.debug("Enter: invoke()");
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}
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assert closeable != null : "invoke(): Closeable has been closed!!!!";
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return method.invoke(closeable, args);
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}
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}
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